<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hello World</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>  
<div id="app">
    <p>{{message}}</p>
</div>
<script>
const vm=Vue.createApp({
    setup(){
        return{
            message:'hello World!'
        }
    }
})
vm.mount('#app')
</script>
</body>
</html>